readme.txt

来自「VXWORKS操作系统下的S3C2440声卡驱动源程序」· 文本 代码 · 共 54 行

/*
	1,	These are some definitions for 2440'registers, which are related
	to ac97.you should add them to intigrator.h
*/

#define	rAC_PCMDATA	(*(volatile unsigned *) 0x5b000018)
#define	frCLKCON	(*(volatile unsigned *) 0x4c00000c)
#define	rAC_GLBCTRL	(*(volatile unsigned *) 0x5b000000)	
#define	rAC_GLBSTA		(*(volatile unsigned *) 0x5b000004)
#define	frGPECON	(*(volatile unsigned *) 0x56000040)
#define	frGPEUP		(*(volatile unsigned *) 0x56000048)
#define	rAC_CODEC_CMD		(*(volatile unsigned *) 0x5b000008)
#define	rAC_CODEC_STAT		(*(volatile unsigned *) 0x5b00000c)
#define	AC_MICDATA		(*(volatile unsigned *) 0x5b00001c)


/*2,		The following prog should be taken place of sb16'driver in usrconfig.c*/

#if defined (INCLUDE_SOUND) && defined(INCLUDE_ac97)
    ac97Drv( );            /* install sound driver ac97 */
								/******在此处安装声卡驱动******/
    sb16DevCreate ("/sound");
#endif /* INCLUDE_SOUND && INCLUDE_ac97 */

/*Notice:INCLUDE_SOUND,INCLUDE_ac97 should be defined in configall.h*/


replace:

#if defined (INCLUDE_SOUND) && defined(INCLUDE_SB16)
    sb16Drv ();            /* install sound driver SB16 */
								/******在此处安装声卡驱动******/
    sb16DevCreate ("/sound", 0x220, 5, 1, 5);
#endif  /* INCLUDE_SOUND && INCLUDE_SB16 */


/*************************************************************************/


/*3,		The following prog is initializing interrupt registers related to ac97 
		and connect interrupt.
		It should be added to syshwinit2(),which is inclueded in syslib.c
*/

	 (*(volatile unsigned *)0x4a00001c) &= 0xffffbffe;	/*INTSUBMSK 0x4a00001c*/
	 (*(volatile unsigned *)0x4a000008) &= 0xef7ff0ff;

	(void) intConnect (0x9,audio_send_int,0);
	intEnable (9);